cilantro, stems only • " piece ginger, peeled and roughly chopped • garlic • green onions, chopped • Serrano pepper, chopped • small bunch fresh basil (about 6 - 8 leaves) • palm sugar (1 tbsp for paste, 1 tbsp for sauce) • petit choy (choy mue), halved • can premium coconut milk • fish sauce • (15 to 18) half-shell mussels, fully defrosted • red pepper, cut into thin strips